Integer overflow in QEMU - CVE-2015-5239
Published: August 5, 2020
Vulnerability identifier: #VU33993
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-5239
CWE-ID: CWE-190
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to integer overflow in the VNC display driver in QEMU. A remote attacker can pass specially crafted CLIENT_CUT_TEXT message to the application, trigger integer overflow and perform a denial of service attack via infinite loop.
Affected software
QEMU
Fedora
xen
Fedora
xen
How to mitigate CVE-2015-5239
Install updates from vendor's website.
QEMU - update to 2.1.0
xen - addressed in versions 4.4.3-4.fc21, 4.5.1-9.fc22, 4.5.1-9.fc23
xen - addressed in versions 4.4.3-4.fc21, 4.5.1-9.fc22, 4.5.1-9.fc23
External References
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168077.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168646.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168671.html
- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00026.html
- http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00011.html
- http://www.openwall.com/lists/oss-security/2015/09/02/7
- http://www.ubuntu.com/usn/USN-2745-1
- https://github.com/qemu/qemu/commit/f9a70e79391f6d7c2a912d785239ee8effc1922d